Machine for making tubs and the like



May 5, `1925.

1,536,265 w. M, PAULsoN ET AL MACHINE FOR MAKING TUBS AND THE LIKE Filed DeQ. 9. 1922 L5M. M

May 5, 1925. 1,536,265

w. M. PAuLsoNvE-r AL.

MACHINE FOR MAKING .TUBS AND THE LIKE Filed Dec. 9. 1922 6 Sheets-Shea?I 2 May '5, 1925.

W. M. PAULSON ET AL MACHINE FOR MAKING TUBS AND THE LIKE Filed DSG. 9. 1922 6 Sheets-Sheet 5 May 5,1925. 1,536,265

w. M. PAuLsoN E'r AL l HACHINEFOR MAKING TUBS AND THE LIKEl Filed Dec. 9. 1922 6 Sheets-Sheet 4 May 5, 1925. 5 1,536,285

w. M. PAuLsoN E1' Al.

MACHINE FOR MAKING TUBS AND THE LIKE Filed'nec, s. 1922 e sneets-sheet s May 5, 1925. 1,536,265 w. M. PAuLsoN ET Al.

MACHINE FOR MAKI'NG TUBS AND THE LIKE Filed Ds. 9, 1922 e sheets-'sheet a www Simultaneously a clamping' head descends upon the drum, and with the seating of the bottom operates to compress the stave ends thereabout and force the chime hoop from its carrying' device over and upon the stave ends. The tub is then released and moved out by the conveyor.

More specifically described, with reference to the drawings, the numerals 1 and 2 indicate a pair of spaced side members suitably connected, as by the cross members 3, to form a frame. Supported upon the cross members 3 are a pair of spaced rails 4 extending longitudinally outward from each end of the frame to form respectively a receiving' table and a delivery table for the tubs. Lateral guides 5 serve to position the tubs laterally on the rails.

Operating' between the spaced rails 4 is a conveyor for moving' the tubs longitudinally through the machine and comprising a reciprocatory feed bar G, having its end at the receiving' end of the rails turned up to form a drum engaging dog' 7, and carrying' other spring-pressed dogs 8 positioned to successively engage and progressively advance the tubs along' the rails 4. rhe rear end of the feed bar G is secured to a cross bar 9 slidably supported at its ends beneath the rails 4 upon ways 10.

rl'he feed bar 6 is longitudinally reciprocated by means of a pair of levers 11 and 12 connected by the links 13 and 14 with the cross bar 9. A rock shaft 15, journaled in the frame members 1 and 2 and extending therethrough, carries at each end a flanged collar 1G and 17 to which are respectively secured the levers 11 and 12 for pivotal movement. rThe levers are operated by a pair of conecting rods 18 and 19 having slot bearings engaging the crank pins 2O and 21 carried by a pair of gears 22 and 23 mounted on a shaft 24 journaled in the upper portions of the frame members 1 and 2. A pair of pinious and 26 in driving' mesh with the gears and 23 are carried by a shaft 27 journaled in the frame members and carry- ,ingl also a drive pulley 23 connected with a source of power, as by belting 2S). The con-l necting' rod slot bearing imparts intermittent movement to the feed bar (i, thereby permitting the bottom seating' and stave clamping mechanisms to be disengaged before advancing the tubs.

As the tubs are moved from the receiving' end of the rails t-o the first and operating position, the loose bottoms are pushed along' by the rear edge of the inverted top of the enclosing drum. Being' of less diameter than the inverted drum top, the tub bottom .is not in centered relation thereto but is in Contact with the staves at the rearward side. lf raised from this position, friction with the staves is likely to tilt the bottom and cause it to be jammed or broken.

To overcome this difficulty, we have provided an auxiliary feed or bottom centering device which, as the drum approaches the end of its movement, accelerates the advance of the bottom until drum and bot-tom come to rest in relatively concentric relation.

suitably supported beneath the rails 4 and located centrally of the operating' position of the tubs, is a pair of spaced brackets 30 carrying a shaft 31. A pair of spaced centering bars 32 are intermediately pivoted on the shaft 31 with their upper serrated ends extending laterally of and above the feed bar 6. A spring 33, attached to a cross connection between the lower ends of the bars 32 and having a stationary attachment to a cross member of the frame, normally maintains the upper ends of the bars 32 inclined toward the reeciving end of the machine.

A cross connection 34 between the upper ends of the centering' bars is positioned above the feed bar 6. As the feed bar approaches the end of its tub-advancing movement, a lug' 35 carried thereby engages the member 34 and swings the serrated ends of the centering' bars upwardly and rearwardly into contact with the underside of the tub bottom. The relatively greater speed of the serrated ends of the pivoted centering bars effects an accelerated advance of the bottom, so that at the end of the stroke of the feed bar the bottom is in centered position. The bottom is raised before the return stroke of the feed and centering bars.

Upon the positioning of the drum and bottom as described, the bottom raising and drum locking mechanisms become operative. At this position of the tub the underlying rails 4 are laterally recessed to provide a preferably circular opening' 36 between the rails of somewhat less diameter than of the inverted tub top. Positioned in the recess 36 and flush with the tops of the rails 4 is a pair of substantially semicircular elevating' plates 37 and 33 disposed at each side of thev feed and centering' bars.

.llach of the elevating plates is operatively su pported upon a pair of vertically disposed rods 39 and 40 having their lower ends rig'- idly mounted in a vertically reciprocating' cross head 41. The lat-ter is in sliding engagement at its ends with a pair of vertically arranged guide bars 42 and 43 rigidly supported at their upper ends and intermedi ate portions in the frame members 1 and 2. Pivotally connected to the outer ends of the cross head 41 is a pair of connecting rods 44 and 45, having sl-ot bearings at their upper ends engaging the crank pins 2O and 21 carried by the gears 22 and 23. The slot bearings permit the cross head and elevating' plates to remain at rest in lowermost position during' approximately a half revolution of the gears 22 and 23, in which interval the movement of the tubs is accomplished.

lll)

and lower stop collars 52 and 53 stationarilyl secured to the rods. Springs 54, having stationary frame. attachment and connected respectively to` each of the levers 48 and 49 outwardly of their pivots, normally maintain the loose collars in lowermost position and the yoke portions 52 of .the levers in raised position.

The bent levers 48 and49 serve to lock the drum in position upon the rails 4 while the bottom is being elevated and forced between the converged portions of the stave-s into its iinal seat 1n the croze. As the cross .head 4l rises the rollers 46 `and 47 engage the inclined lower ends of the levers, forcing` them outward and thereby bringing the inwardly extending yoke sections down upon the truss ring '55 and securely clamping the drum to the rails. The further movement of the levers .raises the collars 50 and 51 against the tension of the springs 54,. the latter compensating for any variation in the location of the truss ring on successive drums. Upon lowering the cross head after the bottom is seated, the locking levers are retracted by the spring tension to release the tub. i

`The hoop carrier, deposited on the upturned bottom ends of the drums as the latter are placed on the receiving table, is a self centering1 device comprising a resiliently contractable split ring 56 (Figs. 8 and 9) having a tapered outer periphery adapted to receive and hold a chime hoop as illustrated at 57. Positioned within the ring 5G is a resiliently contractable band 58 lying against the inner periphery of the ring and supported on several retaining guide pins 59 secured in the ring and passing freely through. the band. The ends of the band 5% are turned inwardly in spaced relation as at (30, preferably with a compression spring` (il confined therebetween tending to maintain contact betweenband and ring. The lower edge of the band extends substantially below the ring, serving to enter within the` drum end and position the ring in abutment with the ends of the staves.

Having placed a hoop overthe ring, the band ends GO may be pinched together and the whole device readily set in position on the drum, Athe released band maintaining the ring and hoop in centered jrelation to the stave ends. ris hereinafter described, the

hoop is forced downwardly from the ring over the staves, the ring and `band contracting to permit the passage therefrom of th: tapered hoop.

The chime hoop aiixing mechanism is carried mainly by a vertically reciprocable cross head 62 having end bearings operatively engaging .the upper portions of the guide rods 42 and 43 as at 63 and (54. Bearing blocks G5 and G6, fixed to the flanged end bearings 63 and 64 of the cross head 612, extend downward in sliding` engagement with the guide rods, and carry each a pivot pin 67. Connected to Vthe latter are a pair of connecting rods 68 and 69 extending up- 'ward into driven engagement with a pair of eccentries 7() and 7l mounted on the shaft 24 and preferably secured to the gears 22 and 23 as by bolts 72. Supported on the underside of the cross head 62 is a clamping head adapted to embrace the inverted bottom ends of the drums, compress the staves after insertion of the bottoms, and drive the chime `hoops into rplace upon the tubs. The clamping head comprises a center plate 7 3 secured to the cross head and carrying an annular "segmental series of radially movable jaws,

74. `Each of the segmental jaws is provided with a radial slot7 5 in the portion underlying the plate 7 3 (Fig. 7) through whichV passesa bolt 7 G secured .in the plate 73 and carrying a. supporting washer '77 permitting sliding movement of the segment. Springs 78, confined between the vbolts 76 and the outer ends of the slots 75 tend `to force the severaljaws radially outward.

The jaws 74 are constructed with depending angularly disposed stave-clamping portions, collectively forming a segmental annular flange adapted to .receive and enibrace the ends of the staves and a hoop supported thereon. To facilitate entry of the stave ends, the flange preferably tapered.

`Above the taliered inner lower edges of the segments is au annular rece 7S) providing space for the chime hoop when the jaws are closed thereupon, and upwardly terminating in a slioulder S() adapted to engage and drive the hoop from the ring 56' in the downward movement of the head,

the preceding stave-contacting porti-on 8l of the jaws being adapted to compress the staves within the diameter of the chime hoop.

The inward movement of the jaws 74, by which the staves are compressed preparatory to forcing on the c-h-ime hoop, is accomplished by means of a vertically slidable ring S2 operatively engaging the tapered lateral periphery of the series of segmental `jaws. The ring 82 is supported and operatively controlleil by the vertically extending pairs of rods 88 and 84, secured in lateral flanges formed on the ring, and passing' through guide bearings in the cross head ($2. The upper portions of the rods extend above and on opposite sides of the shait 24, and each carries a sleeve adjustably secured to the rod by upper and lower lock nuts 86, the pairs being bridged at their' upper ends by plates 8T.

Mounted at the lower' ends ot each pair of the sleeves 85 is a cross bracket 88 providing a. central bearing for a bar 89 extending' between the two brackets and carrying a roller 90 adjacent each or' the brackets. A pair ot cams 91 and 92, rigidly secured on the shaft 24, operate upon revolution of the latter to engage the respective rollers 90 and torce downward the rods 83 and 84; and the jaw contracting ring 82. Upon disengagement otl the cams, the ring 82 is raised to normal positionreleasing the clamping jaws Tet, by compression springs 93 interposed between the cross head 62 and the lower lock nuts 86. The range of movement ot the ring may bc adjusted by adjusting the lock nuts 86 to raise or lower the rods 83 and 84: relative to the sleeves 85.

The relative movements ot' the clamping head as controlled by the eccentrics 70 and 7l, and of the ring 82 as controlled by the cams 91 and 92, are such that as the clamping head descends upon the inverted drum the ring 82 is relatively in raised position, and the series of jaws 74: is expanded to receive the chime hoop and its carrier and the ends of the staves. Immediately after the completion of the elevatine and seating ot' the tub bottom, as previously described, the cams 9L and 92 engage the rollers 90 and move the ring 82 quickly downward over the descending jaws. This action coinpresses the staves upon the seated bottom and causes the shoulders 8() in the jaws to engage the upperl edge oit the chime hoop, whereupon the. continued descent of the jaws 'forces the chime hoop into position upon the ends olf the staves. The disengagement ot the cams is timed to release the jaws before the upward movement ot the clamping head, so that the jaws may be withdrawn ireely over the seated chime hoop.

XV ith the completion of the hoop aflixing operation, the feed bar (3 becomes operative and moves the tub out of its lposition beneath the clamping head to the delivery end ot the rails t.

It will now be apparent that we have provided e'liicient automatic apparatus for the economical and unitorm assembling, in tubs and like structures, of the bottoms and chime hoops with the side staves.

le claim as our invention:

l. Apparatus of the class described comprising, in combination, means for supporting in sliding movement thereon a container drum and a bottom loosely positioned therein, means .positioned adjacent the path ot said drum for seating said loose bottom therein, and means for applying a hoop upon the bottom end of said drum.

2. Apparatus of the class described -comprising, in combination, means for supporting a container drum and a bottom loosely positioned therein, said drum and bottom being slidable upon said support, means operable to secure said drum to said support at one position thereon, means for seating the bottom in said drum, and means tor applying a hoop upon the bottom-receiving end ot said drum.

3. Apparatus of the class described comprising, in combination, means for intermittently moving a spaced series of upended container drums having bottoms loosely positioned therein successively into position to be operated upon, means operable during the periods ot rest ot said intermittent means to stationarily secure said drums successively in such position, and a plurality of means respectively operable while said drums are so secured to scat said bottoms in their respective drums and to apply end hoops thereto.

et. Apparatus of the class described comprising, in combination, means for supporting in sliding movement thereon an upended container drum and a bottom loosely positioned therein, and means positioned adjacent the path of said drum automatically operable to seat said bottom in the end of said drum,

5. Apparatus of the class described coinprising, in combination, means for receiving and slidably supporting a container drum having a bottom loosely positioned therein, conveying means for moving said drum into position to be operated upon, means for rel aisably securing said drinn in such position, and means operable. Lto place said bottom i n seated engagement with said drum.

(l. Apparatus olE the class described comprising, in combination, a support lor an inverted container' drum and a loose bottom positioned therein, said support being adapted for the sliding moven'ient thereupon of said drum and loose bottom, means normally positioned beneath the path ol? said drum for elevating said bottom into seated engagement with the upper end of said drum, and means for releasably scouring said drum in stationary position over said elevating means.

7. Apparatus of the class described comprising, in combination, means for slidablv supporting a container drum, means 'for positioning a bottom in seated engagement with said drum, means carried by said drum for supporting a hoop adjacent: the end olf lll() nasaae said drum, and means ttor applying said hoop upon said drum after the seating ot said bottom. l

S. Apparatus of the class described comjn'ising, in combination, means for slidably supporting an intermediately trtissed assembly of containerstaves arranged in annular tapering` formation, means operable through the larger end ot said assembly to torce a bottom into seated position in the smaller end oit said assembly, releasable means for securing said assembly during the seating of said bottom, independent means removably mountable on said assembly adapted to support a` hoop outwardly ot the small-er end thereof, and means for compressing said staves about said bottom when seated and thereupon transferring` said hoop from said hoop-supportingmeans into position upon said staves.

9. .Apparatus ot the class described comprising, in combination, a support, conveying means for intermittently moving a series of assemblies or container st aves into successive positions upon said support, means operable in one o said positions to successively insert a bottom in seated relation to the assembled staves, a plurality oi' means each of which is arranged to support a hoop adjacent one end of one of said assemblies of staves respectively and adapted j to be` carried thereby, means successively ill).

operable to compress said s'taves about said bottoms when seated and means `for successively driving said hoops over the coinpressed ends of said staves.

l0. Apparatus of the class described comprising, in combination, means for slidably supporting a container drum and a loose 'end closure therefor, said drum being of tapering structure with its smaller end uppermost and enclosing said loose end closure within its supported larger end, means 'for sliding said drum into position to be 4operated upon7 means for centrally positioning` said closure within said drum in such position, and means for elevating said closure into seated engagement with the smalleriend portion ot said drum.

1l. Apparatus of the class described comprising, in combination, a pair of spaced rails 'forming a support ior a container drinn and au unattached bottom there'torl. said bottom being positioned on said rails within the supported end ot said drum, a recijnocatory conveyor operable between said rails to move said drum into successive positions along the rails, a pivoted bar angular-ly disposed relatively to said conveyor and having one end movable `hrough Aa path extending above said rails in one of said positions,` means on said conveyoradapted to cause said bar in the drum-forwarding movement oi said conveyor to swing into engagement with the said bottom and accelerate the movement thereof out of contact with said drum, and means for elevating said bottom into seated engagement with said drum.

1Q.r Apparatus of the class described comprising, in combination, a support ior the sliding movement thereon of a container drum having a truss ring tl'iereabout and a loose bottom within said drum, means for elevating said bottom into seated relation to said drum, and means operable by said elevating means adapted to engage said truss ring and secure said drum to said support.

13. Apparatus of the class described comprising, in combination, a support for an assembly of staves, means for releasably securing said assembly of staves to. said support, means for seating' a bottom within the end portions of said staves, a device carrying a hoop and adapted to be deposited on the ends oli said staves, a` reciprocatory clamping head having an annular series ot normally expanded j aws movable intoembracingv relation to said stave ends and said hoop, and means for contracting said jaws during the embracing movement oit said head to compress said stave ends and cause said jaws to drive said hoop thereupon.

lll-j Apparatus of the class described comprising, in combination, a support Jfor an assembly of staves, means for seating a bottom within the end portions. of said staves. means for supporting a hoop adjacent the ends of said staves, a reciprocatory clamping head having an annular series of normally expanded jaws movable into embracing relation to said stave ends and said hoop, and an independently reciprocatory ring slidably engaging said jaws, said ring being operable to contract said jaws into compressing engagement with said stave ends and driving engagement with said hoop.

15. In apparatus of the class described, in combination, a support for the sliding movement thereon of an inverted bottomless tub or the like and a loose bottom positioned within the tub, an intermittently operable conveyor adapted to move 'said tub into successive ypositions on said support, a plunger intermittently operable through said support in one of said positions to seat said bot-torn in said tub, means associated with said plunger and operable with the upward movement thereof adapted to secure said b'ottomless tub in said one position, and driving means :tor alternately operating said conveyor and said plunger.

i6'. In apparatus of the class described, in combination, a support for a tub drum and a loose bottom therefor, a reciprocatory conveyor bar operable to move said drum and bottom into successive positions on said support, a plunger operable through said support in one of said positions to seat said bottom in said drum, a reciprocatory cross head operatively supporting said plunger', means operable by said cross head to secure said drum in said one position, a driven crank, a link having a slot bearing connecting said crank and said cross head, a lever having a connection with said conveyor bar, and a second link having a slot bearing connecting said crank and said lever, said slotted links being relatively angularly disposed and operative to canse the intermittent alternative movement of said drum and said bottom-seating plunger'.

17. ln apparatus of the class described, in combination, a support for an inverted bottomless tub or the like having a truss ring thereabout and a loose bottom positioned within the tub, a plunger operable through said support to carry said bottom into seated relation to said tub, a reciprocatory cross head operatively supporting said plunger, and a pivoted lever operable by said crosshead to engage said truss ring and secure said tub to said support during the seating` movement of said plunger.

18. In apparatus of the class described, in combination, a support for an inverted bottomless tub or the like having a truss ring thereabout and a loose bottom positioned within the tub, a plunger operable through said support to carry said bottom into seated relation to said tub, a reciprocatory cross head operatively supportingT said plunger, a lever operable by said cross head to engage said truss ring, a movable pivot support for said lever, and resilient means for securing said lever in said engagement with said truss ring and thereby resiliently clamp said tub to said first mentioned support during the seating movement of said plunger.

19. In apparatus of the class described in combination, a pair of spaced rails forming a support for an inverted bottomless tub and for a bottom loosely inclosed therein, a reciprocatory bar between said rails having tub engaging dogs operable in one direction to move said tub into successive posi tions, a pair of spaced levers pivotally supported beneath said bar and having serrated ends extending above said bar and swingable above said rails in one of said positions, a cross connection between said levers, a lug on said bar adapted to engage said cross connection and swing said lever ends into contact with said bottom during the tubadvancing movement of said bar whereby said bottom is moved into laterally spaced relation to said tub, and elevating means for seating said bottom.

20. In apparatus of the class described having a support for an assembly of staves with a bottom seated therein and with a hoop supported adjacent the ends thereof,

the combination of a reciprocatory clamping head having movable jaws adapted to enclose said hoop and said sta-ve ends in the movement of said clamping head, a reciprocatory cross head supporting said clamping head, a driven shaft, crank means on the shaft, a driving connection from said crank means to said cross head, a ring slidably mounted on said jaws and operable to contract said jaws, operating' rods attached to said ring and slidably supported on said cross head, bearing members carried by Said rods, and cani means on said shaft adapted to operatively engage said bearing members thereby causing said jaws to be contracted into engagement with said staves and said hoop during the said enclosing moven'lent thereof and elfecting the compression of said stave ends andA the seating of said hoop thereover.

2l. In apparatus of the class described having a support for an assembly of staves with a bottom seated therein and with a hoop supported adjacent the ends thereof, the combination of a reciprocatory clamping head having movable jaws adapted to enclose said hoop and said stave ends in the movement of said clamping head, a reciprocatory cross head supporting said clamping head, a driven shaft, crank means on the shaft, a driving connection from said crank means to said cross head, a ring slidably mounted on said jaws and operable to contract said jaws, operating rods attached to said ring and slidably supported on said cross head, bearing members carried by said rods, said bearing members being adjustable on said rods to vary the normal position of said ring relative to said jaws, and cam means on said shaft adapted to operatively engage said bearing members, thereby causing said jaws to be contracted into engagement with said staves and said hoop during the said enclosing movement thereof and effecting the compression of said stave ends and the seating of said hoop thereover.

22. ln apparatus of the class described, in combination, a clamping head for compressing the stave ends of a tub or the like and seating` a hoop thereupon comprising a center support, an annular series of segmental jaws mounted on said support and ratliall;v movable thereon, resilient means tending` to maintain said jaws in outer position. said jaws having depending angular' stave clamping portions collectively forming a segmental flange with outwardly tapered inner and outer peripheries and with an inner ammlar hoop receiving recess terminating npwardly in a hoop driving shoulder, a ring slidably mounted on the outer periphery of the flange portion of said series of jaws adapted by downward movement to contract said jaws into engagement with said stave ends and said hoop, means for movingsaid clamping head into encirclingl relation to said stave ends and said hoop, and means ilor moving' said ring to contract said jaws intermediately ol' the limits of said encircling' movement.

23. In apparatus of the class described, means for supporting a hoop adjacent the stave ends of a tub or the like comprising a contractable ring adapted to abut the said stave ends and carry a hoop on its outer periphery, and a contractable guide band within said ring havingl an edge extending` outwardly therefrom to enter within said stave ends.

Q-i. in apparatus of the class described, a hoop support Comprising a split ring adapted to carry a hoop on its outer periphery, a split band loosely positioned within said ring having an edge extending outwardly therefrom, inwardly bent spaced end portions on said band, and a plurality of radial guide pins fixed in said ring and passing freely through said band.

25. In apparatus of the class described, in combination, means for slidahly snp-porting an inverted bottomless tub and a bottom loosely positioned therein, means for moving said tub and enclosed bottom alongv said supporting means into position to be operated upon, and a lever positioned adjacent the path of said bottom havinga serrated end swingable into engagement with said bottom, said lever being;- operable by said tub moving means to accelerate the movement of" said bottom and position the same si."

centrally of said tub when in position to be operated upon.

In witness whereof we have hereunto, set our hands.

WALTER M. PAULsoN. AXEL M. WALsTRoM. 

